#PART 1
Part 1 consists of retrieving CES 4.0 data for the Bay Area. Maps will be produced for the PM2.5 and Asthma rankings. Using the data methodology information in the CalEnviroScreen report, the context of the variables can be determined. Firstly, the asthma variable represents the age-adjusted rate of emergency department visits for asthma per 10,000 people (from 2015 to 2017). Alternatively, the PM2.5 variable is quantified by the annual mean PM2.5 concentration in micrograms per meter cubed (from 2015 to 2017). The plots can be seen below.